All names: WISEA J155618.79+212355.1, Gaia DR3 1204677754606267264, TIC 229554602, Gaia EDR3 1204677754606267264, PG 1554+215, WISE J155618.80+212354.9, 2MASS J15561878+2123551, SDSS J155618.78+212354.9, GALEX J155618.8+212353, UCAC4 557-055280, WD 1554+215, Gaia DR2 1204677754606267264
| Parameter | Unit | Gaia EDR3 | Gaia DR2 | Bedard et al. 2017 | Tremblay et al. 2017 | Stilism | Gianninas et al. 2011 | Liebert et al. 2005 | Vincent et al. 2024 | Simbad | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 15 56 18.80 (0.02) | 15 56 18.80 (0.04) | 15 56 18.80 | 15 56 18.78 (0.02) | 15 56 18.29 | ||||||
| Declination | 21 23 54.23 (0.03) | 21 23 54.26 (0.04) | 21 23 54.23 | 21 23 55.15 (0.03) | 21 23 57.12 | ||||||
| Spectral type | DA | DA | DA | DA | DA1.8 | DA2 | |||||
| Effective temperature | [K] | 27123.0 (410) | 27320.0 (410) | 27320.0 (414) | 26270.0 (398) | 26697.0 (273) | |||||
| log(g) | [cgs] | 7.87 (0.05) | 7.90 (0.05) | 7.90 (0.05) | 7.83 (0.05) | 7.95 (0.01) | |||||
| Mass | [M☉] | 0.5 (0.09) | 0.59 (0.03) | 0.55 (0.02) | 0.61 (0.008) | ||||||
| log(Luminosity) | [L☉] | -1.01 | |||||||||
| Cooling age | [Gyr] | 0.0178 | |||||||||
| log(H/He) | |||||||||||
| log(C/He) | |||||||||||
| log(Ca/He) | |||||||||||
| log(Ca/H) | |||||||||||
| log(C/H) | |||||||||||
| log(N/H) | |||||||||||
| log(O/H) | |||||||||||
| log(Na/H) | |||||||||||
| log(Mg/H) | |||||||||||
| log(Al/H) | |||||||||||
| log(Si/H) | |||||||||||
| log(P/H) | |||||||||||
| log(S/H) | |||||||||||
| log(Sc/H) | |||||||||||
| log(Ti/H) | |||||||||||
| log(Cr/H) | |||||||||||
| log(Mn/H) | |||||||||||
| log(Fe/H) | |||||||||||
| log(Ni/H) | |||||||||||
| Parallax | [mas] | 9.83 (0.04) | 9.92 (0.06) | 9.73 (0.5) | 9.83 | 9.83 (0.04) | |||||
| Distance | [pc] | 101.77 (0.4) | 100.84 (0.6) | 102.80 (7) | 102.77 (5) | 110.00 | 113.00 | 101.77 | 101.77 (0.4) | ||
| Composition | H | ||||||||||
| Proper motion (right ascension) | [mas/yr] | 20.86669825 (0.03) | 20.80254178 (0.07) | 20.867 (0.03) | |||||||
| Proper motion (declination) | [mas/yr] | -57.52206739 (0.03) | -57.67212983 (0.07) | -57.522 (0.03) | |||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | |||||||||||
| B magnitude | 15.04 (0.03) | ||||||||||
| V magnitude | 15.26 (0.01) | 15.23 | 15.26 (0.01) | ||||||||
| R magnitude | 15.56 (0.1) | ||||||||||
| I magnitude | |||||||||||
| J magnitude | 15.82 (0.07) | ||||||||||
| H magnitude | 15.87 (0.2) | ||||||||||
| K magnitude | |||||||||||
| u magnitude | |||||||||||
| g magnitude | |||||||||||
| r magnitude | |||||||||||
| i magnitude | |||||||||||
| z magnitude | |||||||||||
| G magnitude | 15.19 (0.001) | 15.21 | 15.19 | 15.19 (0.003) | |||||||
| BP magnitude | 15.07 (0.001) | 15.02 | |||||||||
| RP magnitude | 15.44 (0.002) | 15.43 | |||||||||
| Pan g magnitude | |||||||||||
| Pan r magnitude | |||||||||||
| Pan i magnitude | |||||||||||
| Pan z magnitude | |||||||||||
| Pan y magnitude | |||||||||||
| E(B-V) | 0.023 | ||||||||||
* Constant surface field
Spectra without link are available upon request
The Montreal White Dwarf Database is produced and maintained by Prof. Patrick Dufour (Université de Montréal) and Dr. Simon Blouin (University of Victoria). Please send database updates, corrections, suggestions or bug reports to patrick.dufour@umontreal.ca.